摘要
对添加了微量元素银、钴、锗的精密铸造铍铝合金,进行了室温拉伸试验、扫描电镜观察和能谱仪分析研究。结果表明,添加元素银、钴、锗不会使该合金的显微组织明显变化,添加元素均是通过强化铝相从而对该合金进行强化。该合金的抗拉强度、屈服强度和伸长率比不添加合金化元素的铍铝合金都有较为明显的提高。从微观角度对添加元素强化合金机理进行了理论分析,银、钴、锗有利于改善铍铝合金的脆性,对铍铝合金界面的结合也是有利的。
Effects of silver,cobalt and germanium on microstructure and mechanical properties of the investment casting Be-Al alloy were investigated by tensile testing at room temperature,SEM(scanning electron microscope)observation and EDS(energy dispersive spectrometer)analysis.The results indicate that alloying element,such as Ag,Co and Ge,cannot change the microstructure of the alloy,and they strengthen the alloy as a result of strengthening aluminum alloy matrix.Compared with those of Be-Al matrix alloy,tensile strength and yield strength,elongation of the alloy with Ag,Co and Ge are greatly increased.Mechanism of alloying element strengthening alloy was analyzed theoretically.As a result,the alloying elements are beneficial not only for improving the brittleness but also for bonding the interface of Be-Al alloy.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2010年第10期973-976,共4页
Special Casting & Nonferrous Alloys
基金
国家自然科学基金资助项目(50761006)
关键词
铸态铍铝合金
银
钴
锗
力学性能
强化
Cast Be-Al Alloy,Ag,Co and Ge,Mechanical Properties,Strengthening
